package mydessertstore.persistence.impl;

import mydessertstore.domain.LineItem;
import mydessertstore.persistence.DBUtil;
import mydessertstore.persistence.LineItemDao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class LineItemDaoImpl implements LineItemDao {

    private static final String GET_LINE_ITEM_BY_ORDERID = "SELECT " +
            "ORDERID, LINENUM AS lineNumber, ITEMID, QUANTITY, UNITPRICE FROM LINEITEM " +
            "WHERE ORDERID = ? ";

    private  static final String INSERT_LINE_ITEM =
            "INSERT INTO LINEITEM VALUES (?, ?, ?, ?, ?)";

    @Override
    public List<LineItem> getLineItemsByOrderId(int orderId) {
        List<LineItem> lineItemList = new ArrayList<>();

        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement preparedStatement = connection.prepareStatement(GET_LINE_ITEM_BY_ORDERID);
            preparedStatement.setInt(1, orderId);
            ResultSet resultSet = preparedStatement.executeQuery();

            while (resultSet.next()){
                LineItem lineItem = new LineItem();
                lineItem.setOrderId(resultSet.getInt("ORDERID"));
                lineItem.setLineNumber(resultSet.getInt("lineNumber"));
                lineItem.setItemId(resultSet.getString("ITEMID"));
                lineItem.setQuantity(resultSet.getInt("QUANTITY"));
                lineItem.setUnitPrice(resultSet.getBigDecimal("UNITPRICE"));

                lineItemList.add(lineItem);
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closeStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return lineItemList;
    }

    @Override
    public void insertLineItem(LineItem lineItem) {

        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement preparedStatement = connection.prepareStatement(INSERT_LINE_ITEM);

            preparedStatement.setInt(1, lineItem.getOrderId());
            preparedStatement.setInt(2, lineItem.getLineNumber());
            preparedStatement.setString(3, lineItem.getItemId());
            preparedStatement.setInt(4, lineItem.getQuantity());
            preparedStatement.setBigDecimal(5, lineItem.getUnitPrice());

            preparedStatement.executeUpdate();

            DBUtil.closeStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        }catch (Exception e){
            e.printStackTrace();
        }

    }
}
